Telegraph system



Get. 5 1926. 1,601,942

A. A. CLOKEY TELEGRAPH SYSTEM Filed June 30, 1925 In venfor; AllisanA C/okey Patented Oct. 5, 1926.

units sTA'jrEs 1, 01,942 PATENT or fice.

nrinrson A. owner, or n'urnnnro'nn, new Jnnsnv, ssrenon. TQ w'nsrnnn ELEC- rnrc COMPANY, mconPonn-rnn, or new YORK, 1v. Y., A conroRArIoN on NEW Yon rnrinennrn syszrnm.

Application filed June '30, 1923. Serial No. 648,693.

" work is employed to balance the line so that the receiving mechanisms are unaffected by outgoing signals. Recent developments in the design of submarine cables have made it possible to provide a cable having electrical characteristics which permit a speed of operation far in excess of any used here tofore, but at such high operating speeds it is ditficult to construct an artificial line 7 which will simulate the real cable with sufficien-t accuracy to permit of duplex operation, and the simpler: method of operation Jay therefore in some cases be resorted to with periodical reversals of'the direction of transmission.

In my copending applicatioinfser-ial No. (92.216, filed October 4, 1922, there is disclosed a simplex telegraph system provided with means for automatically reversing the direction of transmission depending upon th traffic conditions at the respective stations. In' many cases the trafiic conditions are continually changing so that while at certain periods of theday there may be a' much greater demand for the transmission of messages 111 one direction, at other periods, trafiic conditions may change so that there is a greater demand for transmission in the opposite direction. To satisfactorily meet such changing traflic "conditions the present invention contemplates a signaling system provided with manually controlled means for reversing at will the direction of transmission over the line or cable.

I This invention maybe more clearly under stood by reference to the accompanying drawing in which the single figure shows the arrangement of apparatus at one of the stations.

At each station there is provided a rotary distributor-comprising a sendingface S, a

receiving face Rand a correcting face C,

the brushes 8, a, 0, associated therewith being i driven by an impulse motor E controlled byan electr cally operated tuning fork F. The

rotary distributors at the respective stations are maintained in synchronism by means of thev electrical. method of speed correction well known in the art and comprising a leak relay G, a correcting relay H, and a resisttance I which is in'series' with the driving magnet of the fork F. Signals are transmitted in the usual manner by means of a perforated tape controlled transmitter K, operating in conjunction with the sending face S and brush 8 of the distributor. lVhen the apparatus is in the receiving position the line impulses are received through the distortion correct-ion network N by the line relay 0 or any suitable type of relay or aniplifying device and are repeated into the printing relay P which'operates in conjunction with the receiving face R and brush 1' to distribute the received impulses to the proper selecting magnets of the receiving mechanism or printer U in a manner which is readily understood by those skilled in the art.

@n'e or more of the channels is-equipped with an auxiliary signalarrangement the construction and operation of which is fully described in Patent No. 1,275,559, of August 13, 191.8 to 1V. A. Houghtaling. auxiliary transmitter which is commonly termed the auto-control transmitter is provided with an auxiliary contact closing cam 2 which operates a battery reversing contact group 3, each time a: certain code combination is transmitted over the line by the operation of that transmitter. This code combination ispreferably that used for 'bell signaling and consists of the figure shift J letter shift. The usual bell con-' trolling contacts in the printer which form' .a part of the auxiliary signaling system are in the present invention replaced by a battery reversing contact groupl, which is arranged to be operated once and then restoredto its normal position eachtime the printing mechanism is operated in accordance wit the codecoinbination for figure shift J letter shift.

When the impulses representing figure shift in the code is received at the printer This vented from influencing the driving U a selecting bar (not shown in the drawings) pivotally connected to bar 25 is operated causing the member 26 to move tothe right, so that the shouldered portion is in alignment with the arm 27. The cam 28 in its rotation engages arm 27 moving it downward and moves the stop arm 29 out of engagement with member 30. Upon the following rotation of the brush 7 selecting bar 31 is selected by the impulses representing letter J and is moved to the right causing the switch member 1 to be operated by the cam surface of member 30. Upon the receipt, at the printer, of the current impulses for letter shift the rocker arm, 32

which rocks the platen is returned to its original position, the operation of the selecting bar and lover arm not being shown in the drawing. It will thus be noted that the s itch member 4r is operated once for each time the combination of figure shift J letter shift is received at the printer.

A direction control. relay 5 equipped with a plurality of contact roups is provided for the purpose of trans ring the line and local circuit connections f om the transmitting to the receiving position and'vice versa. lVhen this relay is in its deenergiaed or sending position the common sending ring (3 is connected through contact 7 and tongue 8 to the cable 1, and the line circuit to the correction network N and line relay 0 is open at contact 9. The action of corrector relay H and corrector resistance T is proforlr F by the grounded contact 10 which engages with tongue 11 thereby short-circuiting resistance I. The transmitter local circuits are made operative by the grounded tongue 1.2 engaging the contact 13 while the local circuits of the receiving mechanism or printer are made inoperative by having this ground connection removed from Contact 1 1. Tongue 15 engages with contact 15 cansing negative battery to be applied to the rotating contact member 17 of a selector Z which is of the type ordinarily employed in train dispatching circuits. One terminal of the magnet 18 of this selector is grounded and the other terminal connected through condenser 19 with tongue 20 of controlling relay 5. Tongue 20 engages contact 21 which in turn is connected to tongue 23 of contact group tact 24; to positive battery; The control relay at the distant or receiving station will occupy the energized position and the line and local circuit connections will therefore be in. the proper condition to permit of the reception of incoming line signals.

In the operation of the device the station illustrated in the drawing will continue to transmit signals over the line, and the distant station at which the control relay is energized will continue to receive theseim- 3 and thence through con pulses until the positions of the respective direction control relays are reversed. This is accomplished at the will of the transmit ting station in the following manner: See tor of the auto-control transmitter is advanced manually to a predetermined position which will cause the code combination figure shift J letter shift to be transmitted over the line five times in succession in the manner described in the patent referred to above. Each time this combination is transmitted the tongue member 23 is moved away from the positive contact 2 1 engaging negative contact 36 and then moved back to again engage positive contact 2 1. Thus five negative impulses alternating with five positive impulses are applied to contact 21 and tongue 20 of control relay 5, condenser 19 and the winding 18 of selector Z, causing the contact member 17 of the selector to be advanced 10 spaces and to come to rest on the stationary contact 87. Negative battery is hus applied through contact 16 and tongue 15 of relay 5, contact member 17 and contact 87 of selector Z to the winding of a slow-acting polarized relay '38 the armature d0 of which is energized and engages contact 39, thereby completing a circuit from battery 41-1 through armature 1O, contact 39 and the operating winding of control relay 5. A non-inductive resistance 4-2 is connected in parallel with the winding of relay 5 to make the latter slow in operation.

Upon the energization of relay 5 the armature 1-3 is attracted causing the contact members or tongues 11, 12, 15 and 20 to be moved to the right, thereby breaking contact with the left hand contact members 10, 13, 16 and 21, respectively and engaging with the right hand contact members. The cable circuit which was connected to the sending face of the distributor by means of contact 7 is thus transferred through the distortion correcting network N to the winding of the receiving line relay 0. The corrector relay H and resistance I are made operative by removing ground from tongue 11 and the ground connection of contact 12 is transferred from contact 13, which is connected to the local circuit of the transmitter K, to contact l which is connected to the local circuit of the receiving printer U. The selector Z is arranged to have its armature or tongue member 17 restored to its normal unoperated position by the passage of single current impulse, through its operating magnet after the armature has come to' rest at any selected position. the control relay 5 is: movedinto engagement with contact 15 the control of selector Z is removed from the positively connected tongue 23 of the auto-control trans miter and is transferred to the negatively connected tongue 16 of contact group a of Thus when tongue member 7-20 of.

the printer and a short current impulse opposite in polarity to the last operating impulse is applied through condenser 19 to the operating winding 18 of the selector, thereby causing the immediate return of the contact member 17 to its unoperative position. The movement of tongue 15 0t relay 5 from contact 16 to contact at? reverses the polarity of the battery applied to the selector contact member 17 but due to the time I lag introduced by the slow action of relays o n x17 1: why 0 am 0 ant .ne quiet return Or mom or 17,. relay 38 will not be operated in the oppcsite direction thereby until the next succeeding operation of the selector.

Upon the operation of the sector 35- the contact 52 andthrough winding of magnet 55 which controls the movement of the auxiliary control transmitter and to ground. As this transmitter is operated the cam members 56, 5'7 and 58 cause the operation ct their respective contacts resulting in the transmission of current impulses representing the code combination figure shift .l letter shift through the cable 1 to the receiving face of the distributor at the receiving station, this combination being sent five suc' cessive times. The line relay at the receiving station in response to these impulses operates the printing relay which in conjunction with the receiving face of the dist-ributor causes the contact group in the printer to be operated five times in succession. T he resulting reversals of polarity due to the operation of the contact group in the printer causes the operation of the selector at the receiving station which in turn results in the operation of the control relay. The operation of this relay completes the operation of eversing the direction of transmission over the circuit and transmission will therefore be commenced and will continue in the opposite direction until changed by the manual operation of the automatic control transmitter at the then transmitting station.

In order to permit the sending of service signals over the line from the transmitting station without interfering with the messages then being transmitted an additional contact 60 is provided on selector Z togethor with relay (31, lamp or indicating device (52 and local battery 68. When it is desired to signal to the receiving station the sector 35 is moved a distance corresponding for example to the transmission of tour successive groups of the figure shift -J letter shift combination thus causing the contact group l at the distant station to be operated tour times in the manner described above and the reversals of battery potential to be thus applied to the selector contactineniber causing it to be ac vanced a sutiicient distance to engage with the contact 60 at the receiving station. The relay corresponding to 61 would thus be operated and causes the lighting of a lamp -62. Any number of such signal lamps may be controlled in this way by pro vidiug the required number of contacts on the-selector and by suitably cut cams in the automatic control transmitter.

What is claimed is '1. A telegraph system adapted for continuous transmission in either direction com prising a pair of terminal stations interconnectcd by a transmission line, a receiving mechanisn'i, a, transmitting mechanism and synchronously driven rotary distributor at each station, and manually operable means for controlling the direction of transmission over said line.

A tele raph system comprising a pair'ot ininal stations interconnected by a transmission line, each of said stations including a receiving mechanism, a transmitting n, and an auxiliary transmitting mechanism operable at the transmitting station and operating through and cooperating with the transmitting mechanism to reverse the direction oi transmission overthe line.

A telegraph system comprising a pair of terminal stations interconnected by a transmission line, each of said stations including a receiving mechanism, mechanism, operating through said transmitting mechanism, an auxiliary transmitting inechanism, and means cooperating with the" arr'xiliary transmitting mechanism for controlling the direction of transmission over the line. a

a. A telegraph system comprising a pair of terminal stations interconnected by a transmission line, each of said stations including a receiving mechanism, a transmitting mechanism, an auxiliary transmitting mechanism, and a mechanical selector under the control or the auxiliary transmitting mechanism for controlling the direction of transmission over the line.

5. A telegraph system comprising a pair of terminal stations interconnected by a transmission line, each of said stations including a receiving mechanism, a transmitting mechanism, an auxiliary transmitting mechanism, and a selective mechanism under the control 01 the auxiliary transmitting mechanism tor transmitting supervisory signals over the line.

6. A telegraph system comprising a pair of terminal stat-ions interconnected by a transmission line, each of said stations ina, transmitting eluding a receiving mechanism, a transmitting mechanism, an auxiliary transmitting mechanism operable only at the transmitting station, .and a switching means under the control of the auxiliary transmitting mechanism for selectively connecting the transmitting and receiving mechanisms with the line.

7. A telegraph system comprising a pair of terminal stations interconnected by a transmission line, each of said stations including a receiving mechanism, a transmitting mechanism, an auxiliary transmitting mechanism, and selective mechanisms at both stations under the control of the auxiliary transmitting mechanism at the transmitting station only for controlling the direction of transmission over the line.

8. A telegraph system comprising pair of terminal stations interconnected by a transmission line, each of said stations including a receiving mechanism, a transmitting mechanism, an auxiliary transmitting mechanism, and a selective mechanism under the control of the .auxiliary transmitting mechanism at the transmitting station only for controlling the operation of switching means to selectively connect the transmitter and receiving mechanisms at that station with the line, and additional means operable from the distant station to control the operation of said first switching means.

9. In a simplex telegraph line, the combi nation of rotary distributors synchronously driven and adapted for continuous transmission in either direction, with manually controlled selective mechanisms cooperating with said distributors to control the direction of transmission over the line.

10. In a simplex telegraph system comprising a pair of terminal stations interconnected by a transmission line, a transmitting and a receiving mechanism at each of said stations and a manually controlled selective mechanism cooperating with said transmitting and receiving mechanisms and under the control 01 the transmitting station only for reversing the direction of transmission over the line.

11. The combination with a transmission line of signal transmitting means at each terminal, signal receiving means at each ter- 13. A simplex telegraph system comprising a pair of terminal stations interconnected by a transmission line, a receiving mechanism and a transmitting mechanism at each station, a feeding mechanism for each of said transmitting mechanisms, switching means for selectively connecting the transmitting mechanism and the receiving mechanism to the line, auxiliary means for controlling the operation of the switching means, and a differential relay, cooperating with the auxiliary control mechanism for disabling the feeding mechanism of the transmitting mechanism during the operation of the am:- iliary transmitting mechanism.

In Witness whereof, I hereuntosubscribe my name this 27th day of June A. 1)., 1923.

ALLISON A. CLOKEY. 

